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IEC 62116:2014

Gulf StandardGSO IEC 62116:2024

GSO IEC 62116:2024Gulf Standard

GSO IEC 62116:2024

IEC 62116:2014

مواصفة قياسية خليجية

المحولات الكهروضوئية المترابطة - إجراء اختبار لتدابير منع تجزئة النظام

Gulf Standard

Utility-interconnected photovoltaic inverters - Test procedure of islanding prevention measures

ICS:

27.160

English Language – اللغةالإنجليزيةEdition 2 – 14/10/2024 – 2 الطبعة

هذه الوثيقة محمية بالقانون

COPYRIGHT PROTECTED DOCUMENT

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GCC Standardization Organization (GSO)

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إدارة التواصل، قسم إدارة المعرفة

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:موقع ويب

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IEC 62116:2014

Gulf StandardGSO IEC 62116:2024

GSO IEC 62116:2024Gulf Standard

Gulf Foreword

GCC Standardization Organization (GSO) is a regional organization which consists of the national standardization bodies of GCC member states. One of GSO main functions is to issue gulf standards and technical regulations through specialized technical committees.

GSO Technical Council in its meeting number (59) held on 10/04/1446 H, which corresponds to 14/10/2024, has approved the update of Gulf Standard GSO IEC 62116:2024 titled "Utility-interconnected photovoltaic inverters - Test procedure of islanding prevention measures" in English language which was studied and adopted by endorsement from International Electrotechnical Commission Standard IEC 62116:2014 through the technical program of GSO Technical Committee for Renewable energy and its storage technologies (TC13) in SAUDI ARABIA schedule . This document will cancel and replace the Gulf Standard GSO IEC 62116:2013.

تقديم خليجي

هيئة التقييس لدول مجلس التعاون لدول الخليج العربية هيئة إقليمية تضم في عضويتها أجهزة التقييس الوطنية في الدول الأعضاء ، ومن مهام الهيئة إعداد المواصفات القياسية واللوائح الفنية الخليجية بواسطة لجان فنية متخصصة.

قرر المجلس الفني لهيئة التقييس لدول مجلس التعاون لدول الخليج العربية في الاجتماع الـ (59) بتاريخ 1446/04/10 هـ ،الموافق 2024/10/14م اعتماد تحديث المواصفة القياسية الخليجية رقم GSO IEC 62116:2024 وعنوانها "المحولات الكهروضوئية المترابطة - إجراء اختبار لتدابير منع تجزئة النظام" باللغة الانجليزية التي تم دراستها وتبنيها بالمصادقة عن اللجنة الدولية الكهروتقنية رقم IEC 62116:2014 ضمن برنامج عمل اللجنة الفنية الخليجية لمواصفات الطاقة المتجددة وتقنيات تخزينها (TC13) المدرجة في خطة المملكة العربية السعودية . على أن تلغي وتحل محل المواصفة القياسية رقم GSO IEC 62116:2013 .

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IEC 62116:2014 ED2 © IEC 2014

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IEC 62116:2014 ED2 © IEC 2014

Gulf StandardGSO IEC 62116:2024

GSO IEC 62116:2024Gulf Standard

IEC 62116

	INTERNATIONAL STANDARD	Edition 2.0 2014-02


	Utility-interconnected photovoltaic inverters – Test procedure of islanding prevention measures

IEC 62116:2014 ED2

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Gulf StandardGSO IEC 62116:2024

GSO IEC 62116:2024Gulf Standard

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information.

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About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigendum or an amendment might have been published.

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IEC 62116:2014 ED2 © IEC 2014

– –

IEC 62116:2014 ED2 © IEC 2014

Gulf StandardGSO IEC 62116:2024

GSO IEC 62116:2024Gulf Standard

IEC 62116

	INTERNATIONAL STANDARD	Edition 2.0 2014-02


	Utility-interconnected photovoltaic inverters – Test procedure of islanding prevention measures

INTERNATIONAL

ELECTROTECHNCIAL

COMMISSION

ICS 27.160ISBN 9782832214428Warning! Make sure that you obtained this publication from an authorized distributor.© Registered trademark of the International Electrotechnical Commission

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IEC 62116:2014 ED2 © IEC 2014

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IEC 62116:2014 ED2 © IEC 2014

Gulf StandardGSO IEC 62116:2024

GSO IEC 62116:2024Gulf Standard

CONTENTS

FOREWORD

INTRODUCTION

1 Scope

2 Normative references

3 Terms and definitions

4 Testing circuit

5 Testing equipment

5.1 Measuring instruments

5.2 DC power source

5.2.1 General

5.2.2 PV array simulator

5.2.3 Current and voltage limited DC power supply with series resistance

5.2.4 PV array

5.3 AC power source

5.4 AC loads

6 Test for single or multi-phase inverter

6.1 Test procedure

6.2 Pass/fail criteria

7 Documentation

Annex A Islanding as it applies to PV systems

Annex B Test for independent islanding detection device (relay)

Annex C Gate blocking signal

Bibliography

INTERNATIONAL ELECTROTECHNICAL COMMISSION

International StandardIEC 62116:2014 ED2

Utility-interconnected photovoltaic inverters - Test procedure of islanding prevention measures

FOREWORD

1)

The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2)

The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.

3)

IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.

4)

In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

5)

IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies.

6)

All users should ensure that they have the latest edition of this publication.

7)

No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.

8)

Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication.

9)

Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62116 has been prepared by IEC technical committee 82: Solar photovoltaic energy systems.

This second edition cancels and replaces the first edition issued in 2008 and constitutes a technical revision.

The main technical changes with regard to the previous edition are as follows:

Previous edition		Present edition
Clause	Real power	Active power
3.7
5.1
5.4
6.1 b)
6.1 d)
6.1 e)
6.1 g)
Table 1
Table 6
Table 7
Table 9
5.2	A PV array or PV array simulator (preferred) may be used. If the EUT can operate in utility-interconnected mode from a storage battery, a DC power source may be used in lieu of a battery as long as the DC power source is not the limiting device as far as the maximum EUT input current is concerned.	A DC power source, such as a PV array simulator, a PV array, or a current and voltage limited DC power supply with series resistance may be used. If the EUT can operate in utility-interconnected mode from a storage battery, a DC power source may be used in lieu of a battery as long as the DC power source shall not be the limiting device as far as the maximum EUT input current is concerned.
Table 5	EUT input voltage 90 %	EUT input voltage 75 %
	EUT input voltage 10 %	EUT input voltage 20 %
	EUT Trip Settings Manufacturer specified voltage and frequency trip settings	Voltage and frequency trip settings according to National standards and/or local code
Tables 6 & 7 (Heading)	Percent change in real load, reactive load from nominal	Percent change in active load, reactive load from nominal output power

The text of this standard is based on the following documents:

FDIS	Report on voting
82/813/FDIS	82/827/RVD

Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be

•

reconfirmed,

•

withdrawn,

•

replaced by a revised edition, or

•

amended.

IMPORTANTThe 'colour inside' logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer.

INTRODUCTION

Islanding is a condition in which a portion of an electric power grid, containing both load and generation, is isolated from the remainder of the electric power grid. This situation is one which electric power providers (utilities) regularly contend with. When an island is created purposely by the controlling utility – to isolate large sections of the utility grid, for example – it is called an intentional island. Conversely, an unintentional island can be created when a segment of the utility grid containing only customer-owned generation and load is isolated from the utility control.

Normally, the customer-owned generation is required to sense the absence of utility-controlled generation and cease energizing the grid. However, when the generation and load within the segment are well balanced prior to the isolation event, the utility is providing little power to the grid segment, thus making it difficult to detect when the isolation occurs. Damage can occur to customer equipment if the generation in the island, no longer under utility control, operates outside of normal voltage and frequency conditions. Customer and utility equipment can be damaged if the main grid recloses into the island out of synchronization. Energized lines within the island present a shock hazard to unsuspecting utility lineworkers who think the lines are dead.

The PV industry has pioneered the development of islanding detection and prevention measures. To satisfy the concerns of electric power providers, commercially-available utility-interconnected PV inverters have implemented a variety of islanding detection and prevention (also called anti-islanding) techniques. The industry has also developed a test procedure to demonstrate the efficacy of these anti-islanding techniques; that procedure is the subject of this document.

This standard provides a consensus test procedure to evaluate the efficacy of islanding prevention measures used by the power conditioner of utility-interconnected PV systems. Note that while this document specifically addresses inverters for photovoltaic systems, with some modifications the setup and procedure may also be used to evaluate inverters used with other generation sources or to evaluate separate anti-islanding devices intended for use in conjunction with PV inverters or other generation sources acting as or supplementing the anti-islanding feature of those sources.

Inverters and other devices meeting the requirements of this document can be considered non-islanding, meaning that under reasonable conditions, the device will detect island conditions and cease to energize the public electric power grid.

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Gulf StandardGSO IEC 62116:2024

GSO IEC 62116:2024Gulf Standard

International StandardIEC 62116:2014 ED2

Utility-interconnected photovoltaic inverters - Test procedure of islanding prevention measures

1Scope

The purpose of this International Standard is to provide a test procedure to evaluate the performance of islanding prevention measures used with utility-interconnected PV systems.

This standard describes a guideline for testing the performance of automatic islanding prevention measures installed in or with single or multi-phase utility interactive PV inverters connected to the utility grid. The test procedure and criteria described are minimum requirements that will allow repeatability. Additional requirements or more stringent criteria may be specified if demonstrable risk can be shown. Inverters and other devices meeting the requirements of this standard are considered non-islanding as defined in IEC 61727.

This standard may be applied to other types of utility-interconnected systems (e.g. inverter-based microturbine and fuel cells, induction and synchronous machines). However, technical review may be necessary for other than inverter-based PV systems.

2Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

IEC/TS 61836, Solar photovoltaic energy systems – Terms, definitions and symbols

3Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 61836 as well as the following apply.

3.1

PV array simulator

DC power source used to simulate PV array output

3.2

EUT

equipment under test

inverter or anti-islanding device on which these tests are performed

Note 1 to entry: This note applies to the French language only.

3.3

MPPT

maximum power point tracking

PV array control strategy used to maximize the output of the system under the prevailing conditions

Note 1 to entry: This note applies to the French language only.

3.4

non-islanding inverter

inverter that will cease to energize a utility distribution system that is out of the nominal operation specifications for voltage and/or frequency

[SOURCE: IEC 61727:2004, 3.8.1]

3.5

island

state in which a portion of the electric utility grid, containing load and generation, continues to operate isolated from the rest of the grid

Note 1 to entry: The generation and loads may be any combination of customer-owned and utility-owned.

3.6

intentional island

island that is intentionally created, usually to restore or maintain power to a section of the utility grid affected by a fault

Note 1 to entry: The generation and loads may be any combination of customer-owned and utility-owned, but there is an implicit or explicit agreement between the controlling utility and the operators of customer-owned generation for this situation.

3.7

quality factor

Qf

a measure of the strength of resonance of the islanding test load

Note 1 to entry: In a parallel resonant circuit, such as a load on a power system

Q_{f} = R \sqrt{\frac{C}{L}}

	where
Qf	is quality factor
R	is effective load resistance
C	is reactive load capacitance (including shunt capacitors)
L	is reactive load inductance

With C and L tuned to the power system fundamental frequency, Qf for the resonant circuit drawing active power, P, reactive powers QL, for inductive load and QC for capacitive load, Qf can be determined by

Q_{f} = (1 / P) \sqrt{∣ Q_{L} ∣ \cdot ∣ Q_{C} ∣}

	where
P	is active power, in W
QL	is inductive load, in VArL
QC	is capacitive load, in VArC

3.8

run-on time

tR

amount of time that an unintentional island condition exists, calculated as the interval between the opening of the switch S1 (Figure 1) and the cessation of EUT output current

3.9

stopping signal

signal provided by the inverter indicating it has ceased energizing its utility grid-connected output terminals
SEE: Annex C.

3.10

unintentional island

islanding condition in which the generation within the island that is supposed to cease energizing the utility grid instead continues to energize the utility grid

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Bibliography

IEC 61727:2004, Photovoltaic (PV) systems – Characteristics of the utility interface

IEEE 519‑1992, IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems

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